Adsorbent



a 25 with the toxins and toxic products of cholera, and

555 with distilled wate Patented Feb. 27, 1934 .ort-ics;

1.94am snsonnen'r John 0. Bird, Philadelphia,

Wyeth a Brother, Incorporated, Philadelphia, Pa, aoorporation of Delaware Pa.,aIIignorto.Iohn

in, Drawing. Application mm c. in

- Serial No. casino 4 china. (oi. lei-so This invention relates to intestinal adsorbents. and has for its primary object the preparation v of an adsorbent which shall be protective against gastro intestinal irritants, adsorbent of the solul ble products of putrefaction or infection and of excessive acidity, and which shall form a mildly astringent corrective for the atonic bowel.

In accordance with this invention the intestinal adsorbent consists of colloidal kaolin of finest nedicinal quality rendered more actively ad sorbent by dispersion in neutral aluminum bydroxide gel.

The nativesilicate of aluminum known as kaolin is an insoluble impalpable powder, chemically inert and unacted upon by: either acids or msM i 4 i Kaolin possesses an enormous superficial area and is one of the most powerful adsorbents known. It adsorbs substances such as bacterial 'toxinsaalkaloidalpoisons and similar undesirable debrisof the intestinal trait. Experiments have shown that kaolin"isnotan-antisepticNagent; but if kept in motion in fluid media it will adsorb large numbers of bacteria, being known ,to combine with the typhoid dysentery organisms. also an attractor oi putrefactive and momma, bacteria.

In order to give the be st preparation for the W internal administration of kaolin Ihave round that an emulsion of medicinal kaolin. with aluhydroxide gel so activates the kaolin as minum to produce the desired results. p

This aluminum hydroxide gel is. preferably 35 prepared in the following manner:

16- lbs; of granular aluminum chloride 0. P. is dissolved in gallons of distilled water and filtered clear into a vessel of approximately 100 gallons capacity. 32 lbs. of ammonia 16 (10%) is diluted with 15 gallons of distilled water. With the solutions of aluminum chloride and ammonia at an approximate temperature of 35 centigrade the ammonia solution is poured into the aluminum chloride solution in athin stream at a slow rate, constant stirring of the aluminum chloride being kept up during the pouring operation.

Aluminum hydroxide is thrown out as a gelatinous precipitate which breaks up .under agitation. After the whole of-the ammonia solution has been added to the aluminum chloride a slight excess of ammonia is? added to the combined mixture, which is then allowed to settle. The supernatant liquid is then siphoned off and the resultant precipitate washed at least five times the precipitate being al- This reduction of dosage of kaolin is accomplisl. ad

' physical; chemical re of this emulsion being infinitesimal, or entirely lowed to settle after each washing, the resultant supernatant wash liquid being siphoned off after each settling until the precipitated aluminum hydroxide isffree of ammonium chloride.

The resultant aluminum hydroxide gel thus precipitated has the appearance ofa smooth translucent cream. and possesses great superficial area of particle and high adsorptivepower. The gel is then transferred to a clean receptacle and is diluted with distilled water to approximately 15 gallons. Substantially 39 pounds of v finest medicinal. colloidal kaolin 'is stirred with suiiicient water to form a thin cream, the cream thus prepared then being strained through a fine cloth. After straining the kaolin is mechanically mixed with the aluminum hydroxide gel and to the mixture is added suilicient distilled water to bring the mixture to 25 gallons.

In order to render the product more palatable suitable fiavor is now added. I have found the e following acceptable:

Saccharin soluble gm. Oil anise mins. Oil peppermint 160 mine. go 1 Oil pineapple; 120 mins.

400 mins.

Compound spirits orange.

After the addition of the flavor-the mixture emulsified by passing through a homogeniner or other suitable emulsifying apparatus. The resultant product is a white creamy fluid compound of approximately-20% medicinal kaolin emulsifled by 255% absolute aluminum hydroxide (dry basis), with the remainder consisting of distilled water and flavor. v

V By combining kaolin and aluminum hydroxide gel in the manner stated, the amount of kaolin per dose is appreciably lower than has been necessary. to" use in administration heretofore.

by intensifying its adsorptive effect with aluminum hydroxide gel, and kaolin thuspeptized and rendered stable and motile by aluminum hydroxide gel oifers medication by physical adsorption. without systemic absorption of, either the kaolin or the aluminum hydroxide gel.

-' The action of this adsorbent is in the main action ,occurring in them sult of the administration.

testinal tractasa re absent. a

Variation in the exact amounts specified herein maybe made without departing from the spirit of the invention. uo

3. An intestinal adsorbent comprising a major 'portion 01 kaolin, and a minor portion of aluminum hydroxide gel.

4. An intestinal adsorbent comprising kaolin, aluminum hydroxide gel, and water, the kaolin held in dispersion in the water by the said gel.

I JOHN BIRD. 

